class_docstr: Test class for metrics tests.
class_docstr_tok: ["Test","class","for","metrics","tests","."]
docstr: Create necessary directories for testing.
docstr_tok: ["Create","necessary","directories","for","testing","."]
code: def setUpClass(self):
      """Create necessary directories for testing."""
      for dir_path in [train_dir, test_dir, output_dir]:
          Path(dir_path).mkdir(exist_ok=True)
  
file_path: skll/tests/test_metrics.py
imports: import unittest
  from pathlib import Path
  from numpy.testing import assert_almost_equal
  from sklearn.metrics import fbeta_score
  from skll.metrics import kappa, use_score_func
  from skll.utils.testing import output_dir, test_dir, train_dir
label_desc: Use image node_id 1 for calling the TestMetrics obj's underlying member method code with example usage: obj.setUpClass() without return types